In FreeRDP before version 2.1.2, an out of bound reads occurs resulting in accessing a memory location that is outside of the boundaries of the static array PRIMARY_DRAWING_ORDER_FIELD_BYTES. This is fixed in version 2.1.2.
https://usn.ubuntu.com/4481-1/
https://lists.debian.org/debian-lts-announce/2023/10/msg00008.html
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-563r-pvh7-4fw2
https://github.com/FreeRDP/FreeRDP/commit/733ee3208306b1ea32697b356c0215180fc3f049
http://www.freerdp.com/2020/06/22/2_1_2-released
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00080.html